Folder structure in Core PHP
Api.class.php // Contain Base class and functions
Helper.class.php // I have added some method
index.php // Execurtable file where all include
require_once("KoronaApi.class.php");
require_once("KoronaHelper.class.php");
// Prepare Data Set
$token = "Token";
// Organization which Manage warehouse and other things
$orgNo = "1";
// A SKU or Number must same as both site ecommerce and korona
$productNumber = "BLVK.Choco";
$qty = 10; // QTY you want to update Minus (-) indicate
// An Object manage stock
$KoronaObject = new KoronaHelper();
echo $KoronaObject->StockAdjustment($token,$orgNo,$productNumber,$qty);